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The marks (out of 100) obtained by a group of students in a science test are 85, 76, 90, 85, 39, 48, 56, 95, 81 and 75. Find the:

(i) The highest and the lowest marks obtained by the students.

(ii) Range of the marks obtained. 

(iii) Mean marks obtained by the group.

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(i)Highest marks obtained by the student = 95 Lowest 

marks obtained by the student = 39 

(ii) Range of marks = Highest marks – Lowest marks = 95 – 39 = 56 

(iii) Mean of obtained marks = 

Thus, mean marks obtained by the group of students is 73.

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